实用宽带高分辨率声表面波线性调频变换功率谱仪  

A practical spectrometer based on SAW chirp z transform

作　　者：陈东培[1] 宫俊杰[1] 周献文[1] 解述[1] 魏玉兰[1] 

机构地区：[1]中国科学院声学研究所,北京100080

出　　处：《声学学报》1991年第1期37-46,共10页Acta Acustica

摘　　要：声表面波(SAW)线性调频变换(CZT)技术是实时傅利叶变换处理的主要支持性技术之一。其实用化研究始于七十年代末。本文将介绍作者以射电天文望远镜为直接应用对象,所研制的SKP-1型宽带高分辨率SAW功率谱仪。其中着重介绍一种扩展CZT变换器固有50％有效工作周期的新方法。并给出谱仪实验室测量的详细性能。SAW chirp z transform processors are widely accepted as a promising supporting technique for real time Fourier transform signal processing It has come into use since the end of 1970's. In this paper a practical SAW CZT spectrum analyzer with a broadband and a high frequency re-solution designed for use in radio astronomy is discussed. It's performances and specifications tested under laboratory conditions as well as a method to extend the duty cycle of SAW CZT processor from 50% to 100% are presented.

关 键 词：声表面波 线性 调频变换 功率谱仪 

分 类 号：TN65[电子电信—电路与系统]